Hi,
I am sharing my recent experience sending two of my repaired signal generator for calibration. This lab is a well know international company. They were ANAB accredited for ISO17025 and I checked with ANAB, they were indeed accredited for the scope of my calibration. I was charged a premium price for the calibration. Upon completion of the calibration I was furnished with 18 pages of calibration report, and this where the horror began.
1. The standard they used for calibration: the power sensor starts 10 MHz, but they measured power down to 300 kHz with that sensor and it passed the test, must be a miracle sensor.
2. I have two pages of testing of LF Output of the signal generator, they did frequency response test, accuracy of output voltage, frequency and so on, here is the kicker both my unit don't have LF output.
3. Another pages was for pulse modulation, my unit does not have pulse modulation option either.
4. SSB phase noise test, they used a spectrum analyzer with phase noise worse then my sig. gen, and yet the test pass superbly, though the limit they stated is wrong.
At first i was thinking, maybe they used a wrong template, till i got the other certificate, same horror show and the result stated is different indicating they must be using a random number generator
In this case my question is how is ANAB certifying all this labs, are they also just giving out accreditation.
How many people have encountered this kind of laboratories?
Basically the are just churning out fake certificates